Mailer Daemon should be set up to require for all message the "read receipt".
It's very boring ask every time.
Thank you for sharing your idea to always require a read receipt. Responding to a read receipt is a function of the email client. WorldClient can be configured to always send a read receipt when one is requested by going to Options, Personalize, and setting the option for Send Read Confirmations to Yes. If you want all of the emails you send to request read receipts you can use the content filter in MDaemon to add X-Confirm-Reading-To and Disposition-Notification-To headers to your email with the value set to your email address.
Fiona Cheeseman commented
A how to do this instruction set would be useful. I have eventually found content filtering but I cant figure how to add a delivery request receipt or read receipt rule.